Final answer:
To get a complete summary of all network interfaces on a Windows computer, use the command ipconfig /all.
Step-by-step explanation:
The command that can be used to display a complete summary of all network interfaces on a Windows computer is ipconfig /all.
This command provides detailed information about each network interface, including the IP address, subnet mask, default gateway, and DNS servers.
It also displays the MAC address of each network adapter, which can be useful for network troubleshooting or configuration.